Difference between revisions of "Assembler:Commands:CMOVS"
(Created page with 'Category:Assembler '''command''' cmovs ''destination, source'' cmovs is CMOVcc instruction, The cmovs (conditional move if sign) check the state of '''SF''', if '''SF=1''' t…') |
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'''command''' cmovs ''destination, source'' | '''command''' cmovs ''destination, source'' | ||
| − | cmovs is CMOVcc instruction, The cmovs | + | cmovs is CMOVcc instruction, The cmovs ''conditional move if sign'' check the state of '''SF'''. |
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| + | If '''SF=1''' then condition is satisfied, otherwise it will be skipped. | ||
| + | |||
| + | CMOVcc instructions are mainly used after [[Assembler:Commands:CMP|CMP]] | ||
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| + | |||
| + | <div style="padding:2px;border:1px dashed #2f6fab;background-color:#f4f4f4;"> | ||
| + | The CMOVcc instructions check the state of one or more of the status flags in the EFLAGS register (CF, OF, PF, SF, and ZF) and perform a move operation if the flags are in a specified state (or condition). A condition code (cc) is associated with each instruction to indicate the condition being tested for. If the condition is not satisfied, a move is not performed and execution continues with the instruction following the CMOVcc instruction. | ||
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| + | These instructions can move a 16- or 32-bit value from memory to a general-purpose register or from one general-purpose register to another. Conditional moves of 8-bit register operands are not supported. | ||
| + | |||
| + | The terms "less" and "greater" are used for comparisons of signed integers and the terms "above" and "below" are used for unsigned integers. | ||
| + | </div> | ||
Latest revision as of 09:38, 8 January 2018
command cmovs destination, source
cmovs is CMOVcc instruction, The cmovs conditional move if sign check the state of SF.
If SF=1 then condition is satisfied, otherwise it will be skipped.
CMOVcc instructions are mainly used after CMP
The CMOVcc instructions check the state of one or more of the status flags in the EFLAGS register (CF, OF, PF, SF, and ZF) and perform a move operation if the flags are in a specified state (or condition). A condition code (cc) is associated with each instruction to indicate the condition being tested for. If the condition is not satisfied, a move is not performed and execution continues with the instruction following the CMOVcc instruction.
These instructions can move a 16- or 32-bit value from memory to a general-purpose register or from one general-purpose register to another. Conditional moves of 8-bit register operands are not supported.
The terms "less" and "greater" are used for comparisons of signed integers and the terms "above" and "below" are used for unsigned integers.
Command Parameters[edit]
| Parameter | Description |
|---|---|
| destination | r16 / r32 |
| source | m16-r16 / m32-r32 |
Examples[edit]
cmovs dx,ax
cmovs cx,[bx]
cmovs edx,[edx+110]
cmovs eax,edx
cmovs esi,[00123abc]
cmovs edi,[UserDefinedSymbol]
